Update changelog for v0.8.0v0.8.0

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

CHANGELOG.md

@@ -1,6 +1,15 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
+## 0.8.0 – 2018-08-24
+### Added
+- Ability to enable all three gateways (Signal, SMS, Telegram) at the same time
+- An occ command to get the configuration status
+- An occ command to interactively configure the gateways
+- Ability to set a custom URL for the Signal gateway
+### Fixed
+- Fatal errors if no provider has been configured
+
 ## 0.7.0
 ### Added
 - First working implementation